My take on a discrete shunt voltage regulator - Page 18

ikoflexer · 4th November 2009, 11:11 AM

A thin flat line, I like that! Well done!

ikoflexer · 4th November 2009, 11:14 AM

Quote:

Originally Posted by Salas

I test an SE Mosfet ccs'ed headphone buffer with shunt reg as we speak.

AKG 701, Grado SR60. 701 is a pig needs gain. SR60 happy.

Headphones can be extremely revealing. Are you going to let us know the results or should I ask privately?

Salas · 4th November 2009, 11:47 AM

Its nothing much. An IRF630 CCS'ed underneath at half 18V B+ and 260mA I bias. 0.75A Vbe V1 for both channels. 100VA Tx 2X4700 Elna //, soft recovery diode bridge. Dead silent even on sensitive cans, you need a led to know its on. Has triode type sound. Good tempo and a little upfront but grainless. V1 helped it a lot. Fleshes it out. I need to add a gain stage for insensitive headphones too on input 2. Anyone know a single psu opamp that is cheap, easily available and has smooth sonics?

ikoflexer · 4th November 2009, 11:54 AM

Why not a use a 2sk170 for gain? Simplistic

Salas · 4th November 2009, 11:56 AM

Clips early if simple common source. 2N5459 takes 2V p-p but at 6V p-p that CD is clips too. With available B+ that is.

Salas · 4th November 2009, 12:32 PM

Maybe I will use a normal +/- psu op amp from my drawer by creating a virtual ground, ...it will need yet another ac coupling on its input.

ikoflexer · 4th November 2009, 01:36 PM

I don't know, but I built two different phono stages based on opamps. Tried various opamps too. Then built your discrete phono and there was just no contest.

Salas · 4th November 2009, 01:46 PM

Its not something to keep. I was just helping a friend to finish it, because he stumbled. Its great for what it is, and I just want it to have an add on for his low efficiency cans too. Its concept is to be a buffer for efficient headphones. Practical little project, not for critical purposes.

stormsonic · 4th November 2009, 04:15 PM

Quote:

Originally Posted by Salas

Anyone know a single psu opamp that is cheap, easily available and has smooth sonics?

http://www.sg-acoustics.ch/analogue_...distortion.pdf

pick up your favorite...

HiFiNutNut · 4th November 2009, 07:47 PM

When will a C-Multiplier in front of the CCS-shunt be available?

4th November 2009, 11:11 AM	#171
ikoflexer diyAudio Member Join Date: May 2008 Location: Toronto	A thin flat line, I like that! Well done! __________________ Shunt reg latest:positive rail revision 5k negative rail revision 5d and new: E-MU_0404_USB_mod_wiki

4th November 2009, 11:54 AM	#174
ikoflexer diyAudio Member Join Date: May 2008 Location: Toronto	Why not a use a 2sk170 for gain? Simplistic __________________ Shunt reg latest:positive rail revision 5k negative rail revision 5d and new: E-MU_0404_USB_mod_wiki

4th November 2009, 01:36 PM	#177
ikoflexer diyAudio Member Join Date: May 2008 Location: Toronto	I don't know, but I built two different phono stages based on opamps. Tried various opamps too. Then built your discrete phono and there was just no contest. __________________ Shunt reg latest:positive rail revision 5k negative rail revision 5d and new: E-MU_0404_USB_mod_wiki

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
The simplistic Salas low voltage shunt regulator	ikoflexer	Power Supplies	2133	Today 04:36 PM
Tube for a shunt voltage regulator	jarthel	Tubes / Valves	14	26th October 2006 04:19 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

4th November 2009, 11:47 AM	#173
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	Its nothing much. An IRF630 CCS'ed underneath at half 18V B+ and 260mA I bias. 0.75A Vbe V1 for both channels. 100VA Tx 2X4700 Elna //, soft recovery diode bridge. Dead silent even on sensitive cans, you need a led to know its on. Has triode type sound. Good tempo and a little upfront but grainless. V1 helped it a lot. Fleshes it out. I need to add a gain stage for insensitive headphones too on input 2. Anyone know a single psu opamp that is cheap, easily available and has smooth sonics?

4th November 2009, 11:56 AM	#175
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	Clips early if simple common source. 2N5459 takes 2V p-p but at 6V p-p that CD is clips too. With available B+ that is.

4th November 2009, 12:32 PM	#176
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	Maybe I will use a normal +/- psu op amp from my drawer by creating a virtual ground, ...it will need yet another ac coupling on its input.

4th November 2009, 01:46 PM	#178
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	Its not something to keep. I was just helping a friend to finish it, because he stumbled. Its great for what it is, and I just want it to have an add on for his low efficiency cans too. Its concept is to be a buffer for efficient headphones. Practical little project, not for critical purposes.

4th November 2009, 07:47 PM	#180
HiFiNutNut diyAudio Member Join Date: May 2004 Location: Sydney	When will a C-Multiplier in front of the CCS-shunt be available?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)